Quake3World

I just got myself a hot cup of coffee and i noticed something peculiar: when you stir the coffee and tap your spoon repeatedly on the bottem of the cup, it makes a tapping sound that increases in pitch.

What causes this? I am mystified!

added milk or sugar? its increases density of the liquid ysee, therefore buffering much of the sound.
same goes for when you stir it, the circular motion creates a vortex decreasing the center depth and therefore buffering less of the sound.

Yeah i put in some milk & sugar, this coffee machine makes a rather strong double espresso. So then, this wouldn't work with just hot water?

EDIT: oh wait, you're saying this would work with just water but the milk & sugar adds to the effect?

water doesnt buffer as much as something like coffee would so the effect is probably too small to notice, but it should cause the same effect.
it also works with milk & nesquick

Heheh - okay then. Thank you sir, for your wise words. :icon14:

I've noticed that with hot chocolate as well and I think the same effect can be noticed with plain water too.